Simrad SC90, Installation Manual

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419050/B
65
Requirement for watertight integrity
The size, location and design of the sonar room must fulfil all the requirements to the
vessel’s watertight integrity.
In the event of a major leak, it must be possible to close all watertight hatches and/or
doors to the room to maintain the vessel stability and safety.
The physical size of the compartment must be limited, so that in the event of a major leak,
the flooding of the room will not induce instability, or cause the vessel to capsize or sink.
Ensure that all watertight decks and bulkheads are inspected periodically to verify that
there are no unprotected openings or improper penetrations that will allow progressive
flooding from the compartment, and that the watertight doors and hatches are in place
and in working order.
Ensure bilge high level alarms are arranged to provide the earliest warnings of abnormal
accumulation. The high level bilge alarms must be set as low as possible to the deck
or bilge well and positioned along the centre area of the compartment or in a location
at which the fluids will gravitate to first.
All cables leading in and out of the sonar room must be run in steel conduits. These steel
conduits must reach up and above the freeboard deck.
Size and access requirements
A well designed sonar room with a well fitted size and easy access reduces the risk of
corrosion, and simplifies maintenance. This increases system reliability.
Note
The physical size of the sonar room must be limited, so that in the event of a major leak,
the flooding of the room will not induce instability, or cause the vessel to capsize or sink.
The sonar room must be large enough to house all the system units. The room must
provide enough space to allow efficient maintenance. You must be able to keep all the
cabinet doors fully open without undue restriction to your movements.
1 The room must not be used for any other heavy machinery.
2 The room must not be unnecessarily obstructed by girders, pipes etc, which may
cause installation problems or impede maintenance.
3 The sonar room must be accessible under all conditions at sea or at a berth.
4 All doors or hatches must be designed so that the tools and equipment can be
removed without being disassembled.
5 All cables leading in and out of the sonar room must be run in steel conduits. These
steel conduits must reach up and above the freeboard deck.
Preparations